Spence, R. (1991). Clipper Programming Guide (Ed.2.). Bnb Publication.
Chicago Edition CitationSpence, Rick. Clipper Programming Guide. Ed.2. Bnb Publication, 1991.
MLA Edition CitationSpence, Rick. Clipper Programming Guide. Ed.2. Bnb Publication, 1991.
Warning: These citations may not always be 100% accurate.